intransitive. figurative or in figurative context; esp. To come by chance, stumble, blunder into, on, upon.

intransitive. To encounter, meet with; esp. (Nautical) to arrive at (land). Obsolete.

intransitive. To come on or upon suddenly or unexpectedly; to happen upon. Obsolete (rare in later use).

intransitive. to luck upon: to find, come across, or obtain by good luck. Hence similarly to luck on, to luck into, etc. Now somewhat colloquial.

intransitive. Originally U.S. To encounter, meet by chance, come across.